AirForce Tex-Rex Brush Gun Big Bore Air Rifle Precharged pneumatic air rifle (PCP) Available in .457 or .510 caliber Overall length: 31.5" Weight: 6.3lbs Barrel: 16" Lothar Walther Cylinder size: 500cc carbon-fiber air tank Operating pressure: 4,500 PSI (310 BAR) Max. Energy: 700 ft/lbs (depending on caliber and weight) Max. Velocity: 1,090 FPS (depending on caliber and weight) Single shot action Weaver/ Picatinny rail Manual safety Two-stage trigger M-LOK Foregrip Made in the USA